Method of drawing hollow glass articles.



No. 832,835. PATENTED DOT, 9, 1906.

s. L. BODINE. METHOD OF DRAWING HOLLOW GLASS ARTICLES.

APPLICATION FILED SEPT. 28. 1904.

WITNESSES INVEIIYOR IINITED STATES PATENT orricn.

SAMUEL LAURENCE BODINE, OF BERWYN, PENNSYLVANIA,Accretion TO WINDOW GLASS MACHINE COMPANY, OF PITTSBURG, PENNSYL VANIA, A CORPORATION OF NEW JERSEY.

- METHOD OF onAwmc-z HOLLOW GLASS Am'lcies.

Specification of Letters Patent.

- Patented Oct. 9, I 906.

Arf'l -iklon filed September 28,1904.- Serialllo. 226,256.

To all whom it may concern:

' Be it known that I,- SAM EL LAURENCE BODINE, of Berwyn, Chester county,.Pennsylvania, have invented a new and useful specification. inwhich the figure is a sectional side elevation showing apparatus arran ed in accordance with my invention.

eretofore in the drawing of hollow or inclosed "lass articles without the use of a core it has beenconsidered necessary to supply air under pressure to the interior of the article in order to hold the article to the desired size and prevent drawing in or contracting of the article during drawing. '1 have discovered that such articles can be drawn from a glass-bath without the admission of air under pressure, the size of the article being regulated during drawing by the heat applied and the drawing in being thus preventedthat is, by. raising or lowering the tempcratureof the glass in the pot or receptacle I can increase or decrease the size of the article during the drawing operation. If the article tends to contract, by cooling the glass in the pot the size of the article will in crease and the point ofdrawing be moved out toward the walls of the pet. I am thus enabled to do. away with the entire complicated system of air-supply and draw with substantial] atmospheric pressure upon the interior of t e article, while maintaining the desired size. Y I

In the drawing, in which I have shown the invention as applied to the drawing of a it within the furnace 6.

roller or cylinder to be cracked open or flattened for making window-glass, 2 represents the glass-pot, .which is preferably formed with a central hollow boss or projection 3. This pot may be set upon a vertically-mov able block 4, having a hole 5 registering with the hole in the p0t, this block having suit.- able connections arranged to raise and lower The furnace-charm ber maybe rovided with a top stone 7 having a large iole and seat to receive the pot and cut off the point of drawing from the heat in the furnace-chamber. I h. rc shown gas-lmrncrs 8 for heating this chamber and also a burner 9 within the hole in the pot,

this burner being at the end or a supply-pipe '10, through which a mixture of air and gas 13 led to the burner.

hole, so that atmospheric air may flow into the interior of the cylinder or article being drawn.

' The usual drawing apparatus may beemployed for the vertically-movable frame 11 with guides 12. The bait 13, supported on the adjust-able rod 14, may be provided with a surrounding bait of any desirable form, such as the wire bait of the Pease patent, No. 758,560, or the bait of the Lubbers patents, Nos. 743,898 and 758,544. This bait is I preferably make the burner and .pipe of loss diameter than the preferably arranged to allow free communi-.'

cation between the outer air and the interior of the article; 1 i

The drawing is carried out in the usual manner except that the heat applied -to the pot is regulated to keep the glass at such a point that t e cylinder will remain of the same diameter during drawing. The inner burner supplies heated gases to the interior ofthe article during drawing, and in the form shown the air-current will pass up through the article. I

The advantages of my invention result from doing away with the system of air under pressure and the regulating of the size and the shape of the article by heat regulation on the pot or receptacle. Thei'orming of a glass neck and cap is'also avoided. sitter the cylinder is drawn it may be cut oil at the lower end by shears or by lowering the pot to allow the flames to sever the connection.

The interior burner may be done away with and the bait and drawing system may be widely varied. I may draw a cylinder having an opening extending along one side' throughout its length by using a bait with a gap on one side, thus drawing an inclosed article which will do away with the necessity for cracking along one sid'e.-

the word inclosed in the claims I intend to coverthe article, whether completely inclosed or partially so.

1. The method of forming inclosed glass articles, consisting in lowering a bait into a bath ofinoltcn glass, and drawing a hollow a1 ticle upwardly therci'romunder substantially atrnosphcri pressure on the interior, and reguplasticity ofthc iating the size of the article by heat re lation of the glass in the bath; substantial y as described.

2.- The method of formin inclosed glass articles, consisting in attac 'ng the lower edge of abait to the upper portion of a moltengiass bath, gradualiy separating the bait and the bath and drawing the hollow article out .of contact with any shaping-surface, while maintaining substantial atmospheric pressure on the interior of the articl'e; substantially as described.

3. The method of'forming'hollow glass articles consisting in drawing them from a glass-bath and sup lying heated air or gases to the interior of tlic article during drawing;

substantially as described.

the said article through the bait; substantially as described.

6. The method of forming inclosed glass articles consisting in drawing them from a glass-bath and directing a flame into the interior of the article during drawing; substantially as described.

7. The method of forming inclosed glass articles, consisting in applying heat to the lower part of'a receptacle'containin molten glass,'cutting off the heat from the drawi point, engaging the lower edge of a bait wit the glass of the bath, drawing the glass article verticall y under substantially atmospheric pressure on the interior, and regulating the size of the article by heat regulation of the glass in the bath; substantially as described.

81 The method of formin inclosed glass articles, consisting in attac ring the lower portion of a bait to the upper ortion of a molten-glass bath, separating t e bait and bath to draw a hollow article, and regulating, the size of the article by heat regulation of.

the glass in the bath; substantially as described.

In testimony. whereof I have hereunto set my hand.

SAMUEL LAURENCE BODINE.

Witnesses:

GEo. B. BLEMING. JOHN MILLER. 

